由于悬露面积增大或老顶来压引起支承压力集中和转移。
Increased hanging area and weighting of main roof caused abutment stress concentration and stress transfer.
在回采引起的巷道变形中,回采引起的支承压力是主要因素。
The deformation of mining roadway which caused by the mining is produced mainly by the abutment pressure.
运用数值模拟分析方法,研究煤柱支承压力在底板的分布规律。
With numerical simulation method, the distribution law of coal pillar support pressure in the floor was studied.
实体煤帮的高支承压力是影响沿空掘巷稳定性的主要原因之一。
The high abutment pressure on the integrated coal beside the roadway is one of the reasons to lead to floor heave and affect the stability of the roadway driving along next goaf.
煤柱支承压力峰值超前煤壁一定距离,且此距离随工作面长度加大而减小。
The peak value of abutment pressures on coal pillar had a certain distance to the wall, and the distance reduced when the working face width increased.
根据模拟结果,分析了开采范围内支承压力峰值的变化及对顶煤破碎的影响。
On the basis of model's results, effects in top-coal smash, and changes of peak value of abutment pressure within mining range are analyzed.
采动围岩破裂范围和支承压力高应力分布范围取决于开采对岩层的扰动程度。
Ranges of fractured strata and high stress distribution of abutment pressure are all depend on the degree of mining disturbance on stope strata.
一侧采空巷道稳定性不仅与支承压力分布有关,而且与煤体受破坏程度有关。
The stability of goaf-side roadways depends on not only the abutment distribution, but also the fracturing degree of the coal seam and rock strata alone the pillar width.
现场实践表明,大多数冲击地压发生在工作面煤壁前方超前支承压力范围内。
The in-situ practices show that most rock bursts occur in the front abutment scope ahead of the coal face.
一侧采空巷道稳定性不仅与支承压力分布有关,而且与煤体受破坏程度有关。
Research on Destruction Mechanism and Supporting in Roadway of the Steep Coal Seam of Taiping Coal Mine;
得出了超前支承压力存在两个峰值,其峰值大小、位置受煤层采动影响的变化规律。
The result shows that there are two stress peaks in the abutment pressure and its magnitude and location are affected by the mining.
以放顶煤开采现场实测为基础,着重探讨了顶煤的变形特征、顶煤变形与支承压力的关系;
Based on in situ measurement with sub-level caving mining, the characteristics of top-coal deformation and top-coal deformation vs abutment pressure are mainly discussed.
加长孤岛综放工作面长度,护巷大煤柱和小煤柱的支承压力均减小,可以减小护巷煤柱宽度。
Lengthening the width of isolated fully mechanized top coal caving face would reduce the abutment pressures for both wide and small coal pillars, and the coal pillar width could be reduced.
结果表明,放顶煤采煤法其支承压力分布形式与分层开采法类似,但在量值及影响范围上有增减。
The result indicated That the abutment pressure distribution form was similar to that of slicing mining method but its magnitude and affecting range changed.
现场实践表明,采用底板支承压力区进行深部松动爆破能有效控制回采巷道底鼓,满足生产需要。
Field practice shows that the method of making loose blasting deeply in the area of the mining abutment pressure can control the entry floor heave effectively and meet the need of the production.
据此原理,实测得到了平煤集团十三矿12010大倾角综放开采工作面走向支承压力和区段煤柱侧向支承压力分布。
Accordingly, the distribution of abutment pressure on the block coal pillar is measured at working face with a steeply inclined seam of the12010 face, NO.
研究结果表明,煤柱上支承压力分布是开采影响岩层相互作用的结果,是开采引起集中应力在煤层与直接顶界面上的直接反映。
The results show that the abutment pressure distribution on coal pillar is the direct reflection of abutment stress induced by mining on the interfaces of coal seam and immediate roof.
分层开采与综放开采工作面滞后支承压力变化规律是,随着采高的增大,工作面滞后支承力的距离加大,垂直应力集中系数差别不大。
The lag distance of abutment pressure behind working face increases, but the convergence coefficient of vertical stress doesn't change obviously with the increase of mining height.
本文以现场量测为依据,论述了岩石巷道的锚喷支护受采动影响时,移动支承压力的影响范围、变化规律、围岩松动以及巷道稳定性等。
Based on field measurement, the authors describe zone of influence of abutment pressure, rules of its change, loosening of the surrounding rock and the stability of roadways.
本文对设计降低压力损失和防止振动的管壳式冷却器,提出了一种有效的方法,就是管束采用折流板-扁钢条复合支承。
In this article, one method of using the combined support composed of baffles and flat steel to design tabular heat exchangers with low pressure loss and vibration protection was presented.
桥梁支座是在桥梁结构与桥墩(或桥台)的支承处所设的传力装置,是一种承受高压力的结构部件。
Bridge support is a force transfer device installed at support of bridge structure with pier (or abutment). It is a kind of the structural parts that can bear high pressure.
本文介绍了用扁毛细管节流的液体静压轴承的支承面积、扁毛细管尺寸油空压力及轴承刚度等计算。
The article introduces the calculation of bearing area, flat-capillary size, pressure in the Chambers and the rigidity of the hydrostatic bearing throttled by using flat-capillary.
在某些海上挠性管作业机或特殊陆上挠性管作业机上用于使注入头和压力控制设备稳定的支承构架。
A support structure used to stabilize the injector head and pressure-control equipment on some offshore, or special onshore, coiled tubing units.
根据总体设计要求和设计输入要求,进行了秦山核电二期工程反应堆压力容器支承的结构设计和力学设计。
Structural and mechanical design are performed according to the requirement on the overall design and design input for the reactor pressure vessel support of Qinshan Phase II NPP Project.
水的高饱和蒸汽压力使得水压泵中极易发生气蚀现象,滑靴静压支承也不例外。
High water saturated vapour pressure leads to the more possible occurrence of cavitation phenomena in water hydraulic pump, and so as in sliding shoes hydraulic supporting without exception.
浮动球球阀的球体自由支承在阀座上,靠介质的压力形成单面密封,故不能保证密封。
The fluctuation ball ball valve's spheroid free supporting on the valve seat, forms the one-sided seal depending on the medium pressure, therefore cannot guarantee the seal.
浮动球球阀的球体自由支承在阀座上,靠介质的压力形成单面密封,故不能保证密封。
The fluctuation ball ball valve's spheroid free supporting on the valve seat, forms the one-sided seal depending on the medium pressure, therefore cannot guarantee the seal.
应用推荐